Date Published: May 01, 2010
Publisher: International Union of Crystallography
Author(s): Graham Smith, Urs D. Wermuth.
In the title salt, C12H11N2O2+·C7H4NO5−, the cations and anions interact through asymmetric cyclic pyridinium–carboxylate N—H⋯O,O′ hydrogen-bonding associations [graph set R12(4)], giving discrete heterodimers having weak cation–anion π–π aromatic ring interactions [minimum ring centroid separation = 3.7116 (9) Å].
For structural data on nitro-substituted 4-benzylpyridines and related compounds, see Seff & Trueblood (1968 ▶); Ottersen & Seff (1974 ▶); Scherl et al. (1996 ▶); Smith et al. (1997 ▶); Naumov et al. (2002 ▶). For structures of Lewis base salts of 5-nitrosalicylic acid, see: Smith et al. (1996 ▶, 2005 ▶, 2006 ▶). For graph-set motifs, see: Etter et al. (1990 ▶).